Solitary Plasmacytoma of Tibia in a 29-Year-Old Woman.

Solitary plasmacytoma of the bone is a plasma cell tumor characterized by a single bone lesion with no evidence of myeloma elsewhere, including fewer than 5% plasma cells in the bone marrow. Although median age is about 14 years younger than that of patients with multiple myeloma, both diseases are extremely uncommon under 30 years of age. Solitary plasmacytoma of bone seem to have a prediction to occur in the axial skeleton, particularly in a vertebra and long bones are rarely affected. Herein, we report a case of solitary plasmacytoma of bone involving the tibia in a 29-year-old woman.